[php-src] Issue #13061: "Cannot declare xxx because the name is already in use" is broken with NS

Issue: https://github.com/php/php-src/issues/13061 Author: mvorisek ### Description The following code: ```php <?php namespace Ns; use Ns\Foo; class Foo {} ``` Resulted in this output: ``` (no output/error) ``` But I expected this output instead: ``` Fatal error: Cannot declare class Foo because the name is already in use ``` Without namespace, the error is emit as expected - https://3v4l.org/DAT52, but when namespace is declared, the error is not emit even if the the same use/import statement is present - https://3v4l.org/tt1sL. As the declared Foo class masks the use/import the same way, I would expect an error to be emit in both cases. ### PHP Version any ### Operating System any